were do you come up with this crap?by coping old wrong info you did not find by doing. holmes the dome part goes under the open part of the chamber,of a closed chamber head. you will have more problems with eddy heads and dome pistons because of angle plugs. you have to grind/open up the plug relief in dome. here a pic of 440 i did 3 years ago with ross tall dome pistons and stealth heads, fit perfect. and Dear johnRR my 4340 billet hemi crank and big shinny stage v alum head is so massive your gunna need two hands to lift it,if you say i swallow anything honey

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I run 76 cc edelbrock heads with JE domes 12.7.1, i use autolite AR3931 none projected tip plugs and they clear fine.
Mick